899289261 has 24 divisors (see below), whose sum is σ = 1444025856. Its totient is φ = 535554720.

The previous prime is 899289257. The next prime is 899289271. The reversal of 899289261 is 162982998.

It is not a de Polignac number, because 899289261 - 2² = 899289257 is a prime.

It is a super-2 number, since 2×899289261² = 1617442349899852242, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 899289198 and 899289207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (899289221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 120345 + ... + 127598.

It is an arithmetic number, because the mean of its divisors is an integer number (60167744).

Almost surely, 2^899289261 is an apocalyptic number.

It is an amenable number.

899289261 is a deficient number, since it is larger than the sum of its proper divisors (544736595).

899289261 is a wasteful number, since it uses less digits than its factorization.

899289261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247993 (or 247990 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 54.

The square root of 899289261 is about 29988.1520104190. The cubic root of 899289261 is about 965.2351654668.

The spelling of 899289261 in words is "eight hundred ninety-nine million, two hundred eighty-nine thousand, two hundred sixty-one".